On this page you'll find a sampling of the many resources on Media4Math that focus on the topic of Ratios, Proportions, and Percents. Media4Math is a digital library of over 15,000 resources on all key topics in K12 math.Subscribers can download these resources. Register and Subscribe today. 
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Algebra Applications: Dinosaur Footprints 
Algebra Applications: Dinosaur Footprints
Paleontologists rely on fossils to learn about dinosaurs. They also rely on certain algebraic concepts to help them estimate the sizes of dinosaurs based on the measurements of dinosaur footprints. 

Closed Captioned Video: Percents: Applications of Percent  Grade 
Closed Captioned Video: Percents: Applications of Percent  Grade
Video Tutorial: Applications of Percent  Grade. In this video we investigate the concept of the grade of a road. This is an application of percents, where the slope of a road or a ski slope is written in percent form. We interpret this percent measurement as a slope measurement. 

Closed Captioned Video: Percents: Calculating Commissions and Tips 
Closed Captioned Video: Percents: Calculating Commissions and Tips
Video Tutorial: Percents: Calculating Commissions and Tips. In this video we look at using percent formulas to calculate sales commissions and tips. Various realworld scenarios are investigated for calculating these percentbased amounts. 

Closed Captioned Video: Percents: Calculating Tax 
Closed Captioned Video: Percents: Calculating Tax
Video Tutorial: Percents: Calculating Tax. In this video we look at using tax rates to calculate tax owed. The tax rates are written as percents and converted to decimals to calculate the tax. 

Closed Captioned Video: Percents: Calculating the Whole Given a Percent 
Closed Captioned Video: Percents: Calculating the Whole Given a Percent
Video Tutorial: Percents: Calculating the Whole Given a Percent. In this video learn how to calculate the whole, given a percent and a part of the whole. Students solve percent equations. 

Closed Captioned Video: Percents: Estimating Percents 
Closed Captioned Video: Percents: Estimating Percents
Video Tutorial: Estimating Percents. In this video learn how to estimate percents by converting them to fractions that simplify multiplication. 

Closed Captioned Video: Percents: FractionPercent Conversion 
Closed Captioned Video: Percents: FractionPercent Conversion
Video Tutorial: Ratios: FractionPercent Conversion. In this video learn how to convert percents to fractions to simplify percent operations. 

Closed Captioned Video: Percents: Multiple Percents 
Closed Captioned Video: Percents: Multiple Percents
Video Tutorial: Percents: Multiple Percents. In this video, we investigate calculating the percent of a percent. Multiple calculations of a percent are investigated relative to a combined percent calculation. 

Closed Captioned Video: Percents: Percent Decrease 
Closed Captioned Video: Percents: Percent Decrease
Video Tutorial: Percents: Percent Decrease. In this video, we look at the concept of percent decrease. The formula for calculating percent decrease is shown and used in the context of solving realworld problems. 

Closed Captioned Video: Percents: Percent Increase 
Closed Captioned Video: Percents: Percent Increase
Video Tutorial: Percents: Percent Increase. In this video, we look at the concept of percent increase. The formula for calculating percent increase is shown and used in the context of solving realworld problems. 

Closed Captioned Video: Percents: Percent of a Difference 
Closed Captioned Video: Percents: Percent of a Difference
Video Tutorial: Percents: Percent of a Difference. In this video, students learn how to calculate the whole, given the percent and a part corresponding to another percent. The solution involves a percent difference. 

Closed Captioned Video: Percents: Percent of a Number 
Closed Captioned Video: Percents: Percent of a Number
Video Tutorial: Percents: Percent of a Number. In this video, learn how to find the percent of a number. The examples focus on converting a percent to a decimal. 

Closed Captioned Video: Percents: Percents and Multiples of Numbers 
Closed Captioned Video: Percents: Percents and Multiples of Numbers
Video Tutorial: Percents: Percents and Multiples of Numbers. In this video, we explore the difference between percent growth and the multiple of a number. Several realworld examples are used to explore these differences. 

Closed Captioned Video: Percents: Probabilities and Percents 
Closed Captioned Video: Percents: Probabilities and Percents
Video Tutorial: Percents: Probabilities and Percents. In this video, percent calculations are used to explore probabilities of events. From a percentbased probability predictions are made for given outcomes. 

Closed Captioned Video: Percents: Simple Interest 
Closed Captioned Video: Percents: Simple Interest
Video Tutorial: Percents: Simple Interest. In this video, we look at simple interest in the context of using percent to make calculations. A formula for calculating simple interest is shown and used to solve several realworld problems. 

Closed Captioned Video: Percents: The Percent One Number is of Another 
Closed Captioned Video: Percents: The Percent One Number is of Another
Video Tutorial: Percents: The Percent One Number is of Another. In this video, students learn how to calculate what percent one number is of another. This includes percents greater than 100%. 

Closed Captioned Video: Percents: Visual Models for Percents 
Closed Captioned Video: Percents: Visual Models for Percents
Video Tutorial: Percents: Visual Models for Percents. In this video, learn how to model percent operations using visual models. 

Closed Captioned Video: Ratios and Proportions: Scale Drawings 
Closed Captioned Video: Ratios and Proportions: Scale Drawings
Video Tutorial: Ratios and Proportions: Scale Drawings. In this video, we look at the properties of similar figures and use proportions to find lengths of corresponding sides. 

Closed Captioned Video: Ratios and Proportions: Solving Proportions 
Closed Captioned Video: Ratios and Proportions: Solving Proportions
Video Tutorial: Ratios and Proportions: Solving Proportions. In this video, we solve proportion problems algebraically. 

Closed Captioned Video: Ratios and Proportions: What Are Proportions? 
Closed Captioned Video: Ratios and Proportions: What Are Proportions?
Video Tutorial: Ratios and Proportions: What are Proportions?. In this video, we solve proportion problems using equivalent ratios. 

Closed Captioned Video: Ratios and Rates: Converting Measurement Units 
Closed Captioned Video: Ratios and Rates: Converting Measurement Units
Video Tutorial: Ratios and Rates: Converting Measurement Units. In this video, we show how to use conversion rates to convert from one unit of measurement to another. Students are shown how to create a conversion rate. 

Closed Captioned Video: Ratios and Rates: Rates and Slopes of Lines 
Closed Captioned Video: Ratios and Rates: Rates and Slopes of Lines
Video Tutorial: Ratios and Rates: Rates and Slopes of Lines. In this video we connect the concept of rate of change for a set of linear data to the concept of slope. We use the slope formula to find the rate of change. 

Closed Captioned Video: Ratios and Rates: Rates from Data 
Closed Captioned Video: Ratios and Rates: Rates from Data
Video Tutorial: Ratios and Rates: Rates from Data. In this video, we look at linear data sets that can be used to find the rate of change. 

Closed Captioned Video: Ratios and Rates: Ratios as Decimals 
Closed Captioned Video: Ratios and Rates: Ratios as Decimals
Video Tutorial: Ratios and Rates: Ratios as Decimals. In this video, students explore ratios whose terms are decimals. Students are shown techniques for simplifying these types of ratios in ;the context of solving realworld ratio problems. 

Closed Captioned Video: Ratios, Proportions, and Percents: Calculating Percents 
Closed Captioned Video: Ratios, Proportions, and Percents: Calculating Percents
Video Tutorial: Ratios and Percents: Calculating Percents. In this video, students will see the relationship between ratios, proportions, and percents. A percent formula is derived and used to solve several realworld percent problems. 